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yz 125 dieing

Joined
Aug 8, 2005
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#1
Rose my 98 yz 125 for about 30 minutes today around the house after a proper warm up. I then let it sit for about an hour and a half and then went out and it fired up right away i let it warm up for a little bit because it was still sort of warm. I started driving in low rpms to let it warm up a little more then after about 2 minutes after this i got on the throttle and as the rpms wound up it started bogging and died. Now i can only pop start it and it wound rev up. Compression still feels good. This is a fairly new top end to. Any one have any ideas of what the problem could be? thanks
 
Joined
Jan 14, 2007
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#2
look at your spark plug it probably fouled from the bike being lugged around at low revs. what plug are you using? glad to help need more info.
 
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Aug 8, 2005
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#5
yes ive ridden a two stroke before but i started the bike near the house where children were napping so i was trying to get out of the area so instead of pushing it i decided to ride it a low rpms because i thought it would be easier on the engine and quieter until i got away from the house. I just went back out and just held it open and finnally it got running right again then i came back inside for a minute went out started it up first kick again went to ride off and the same thing it just bogged out and now it wont even run with a pop start. sound like the plug?
 

_JOE_

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May 10, 2007
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#6
Yeah it sounds like the plug. I was just making sure you had a clue what you are doing. There are some people who are completely clueless. Your pilot circuit may be rich also. You should be able to put around without fouling a plug.